How can healthcare professionals act on climate change — concretely? In this interview, Dr Véronique Hentgen from Versailles, France interviews Mathis Egnell, engineer at The Shift Project, about measuring the carbon impact of the healthcare system. Just like in medicine, diagnosis comes first: we must understand where greenhouse gas emissions come from — transport, buildings, medications, care pathways — before we can reduce them effectively. One key takeaway from The Shift